2021-04-21 00:31:36 H=localhost (lists1001.wikimedia.org) [::1]:50190 I=[::1]:25 F=<noreply@lists1001.wikimedia.org> temporarily rejected RCPT <root@lists1001.wikimedia.org>: failed to open /etc/aliases for linear search: Permission denied (euid=114 egid=121)
legoktm@lists1001$ ls -l /etc/aliases -rw------- 1 root root 198 Feb 20 2020 /etc/aliases
Why is it only readable by root? On lists1002 it's world readable, but on e.g. mx1001 it's only readable by root again.